Materials Data on Ca(HO)2 by Materials Project

Ca(OH)2 crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one Ca(OH)2 sheet oriented in the (0, 0, 1) direction. Ca2+ is bonded to six equivalent O2- atoms to form edge-sharing CaO6 octahedra. All Ca–O bond lengths are 2.39 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a distorted single-bond geometry to three equivalent Ca2+ and one H1+ atom.